I have a basic Gentoo system up and running but have yet to install networking since I have only an Intel 2100 DSL [Win]modem available. I should have a working NIC/Cisco router by next week but this may not be enough since I prefer having a dynamic IP. Is there a way to install Gentoo packages over a network with a dynamic IP and if so how would I set up such a network?

2) A fixed IP is a fixed target for a cracker, who can work on it at leisure.

3) A fixed IP is an easier target for Uncle Scam to scan casually (it's much more trouble to target you if he needs to correlate your IP with your ISP's logs and it's therefore much less likely to happen).